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 Post subject: Jeep Overheating
PostPosted: Sun Sep 29, 2013 20:36 pm 
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My friend's jeep has started to overheat while underload and going uphill, seems to keep blowing water out of the radiator.
He's recently fitted a Solex carb instead of the original Cartercarb. She starts and ticks over better, (apart form when cold).
The AA chap suggested it was running lean, and so the Solex needed rejetting to allow more fuel through.
Another suggestion was that water wasn't getting around the rad properly, so there might be a blockage.

Has anyone else had this problem, or can suggest anything?


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 Post subject: Re: Jeep Overheating
PostPosted: Sun Sep 29, 2013 21:49 pm 
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Joined: Mon Sep 05, 2011 19:50 pm
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Location: Coalville,leicestershire
Real Name: Scott allen
Group: Normandy 44
Trermostat if it has one could be not working take it out put it in boiling water and see if it opens if it dont get a new one cooling could be down to two things water pump or thermostat

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 Post subject: Re: Jeep Overheating
PostPosted: Mon Sep 30, 2013 0:13 am 
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Location: Yorkshire
Real Name: Dave
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could be things already suggested , carb won't do it , I've just taken a Solex off and re fitted my Carter it runs better :lol: . I had similar problems of water blowing out of the overflow but not overheating ,it turned out to be the head gasket


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 Post subject: Re: Jeep Overheating
PostPosted: Mon Sep 30, 2013 6:27 am 
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Try a new radiator cap, that fixed my symptoms of a blocked radiator.

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 Post subject: Re: Jeep Overheating
PostPosted: Mon Sep 30, 2013 8:08 am 
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Joined: Mon Jul 25, 2011 17:27 pm
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Location: Kandahar, Afghanistan
A quick look at one of the spark plugs will tell you if its running lean - there are plenty of colour guides on the web. An incorrectly set up carb could well be the cause although it could also be any one of a number of other problems.


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 Post subject: Re: Jeep Overheating
PostPosted: Mon Oct 14, 2013 19:10 pm 
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Location: Bedford
Real Name: jez Harvey
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I had a faulty thermostat, it opened at around 180-190 then one day it stuck, temp went over 200 and boiled over,
I changed it and its been fine since, 170-180 in any conditions.
try the simple things first, dont run it too hot, you risk the engine, if still no joy try the G503 site, very good at diagnosing promblems.


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 Post subject: Re: Jeep Overheating
PostPosted: Mon Oct 14, 2013 19:17 pm 
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cheers I'll pass that info on. The carb is going to be checked and rejetted, then the rad will probably be cleaned out.


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 Post subject: Re: Jeep Overheating
PostPosted: Mon Oct 14, 2013 23:55 pm 
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Real Name: harvey coppock
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You could try feeling different bits of the radiator matrix when its hot, to make sure it is all hot. But getting it off and feeding a hosepipe through each outlet in turn must be a good idea. Flushing out the engine effectively prob won't be as easy. Thermostats restrict flow as well as shut it off, so removing it altogether might increase cooling, but it was designed to have it so there would still be a problem. Filling it with neat antifreeze can upgrade the cooling system a bit, as it carries heat better than water, but you would tend to get more leaks, and again, its meant to cope without doing that.


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 Post subject: Re: Jeep Overheating
PostPosted: Tue Oct 15, 2013 19:26 pm 
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It could just be the seal on the rad cap that is in need of renewing. Another possibility is the spring is weakened and gives up under load. I had a combination of the two on a vehicle (old but not a jeep). Took me ages to figure it out.


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 Post subject: Re: Jeep Overheating
PostPosted: Sun Dec 08, 2013 21:31 pm 
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What fuel are you using ?
Super plus runs cooler than normal unleaded 95RON.


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 Post subject: Re: Jeep Overheating
PostPosted: Sun Dec 08, 2013 21:35 pm 
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As far as i'm aware it's normal unleaded with the adative added, but have passed the info on. Cheers


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 Post subject: Re: Jeep Overheating
PostPosted: Thu Dec 26, 2013 10:03 am 
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Hi, I had that problem, i have no thermostat but always boiled over when towing a trailer and when staying at a steady speed for a while, tock radiator to a rad man and he could not clean it out so fitted a new core, i'm just refitting it today!! Had a Dodge wc that boiled over within half a mile had to have that one taken apart and cleaned out works fine now


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 Post subject: Re: Jeep Overheating
PostPosted: Thu Dec 26, 2013 10:44 am 
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Thanks, I'll pass that on. It's a bit of a bugger really, as it was unreliable starting, now with the new carb it is better, seems to run more smoothly, but now overheats.
Wish it would bloody work properly!


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 Post subject: Re: Jeep Overheating
PostPosted: Wed Jan 01, 2014 13:41 pm 
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May be it is running too lean?

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 Post subject: Re: Jeep Overheating
PostPosted: Thu Jan 02, 2014 0:45 am 
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Joined: Wed Jul 28, 2010 22:28 pm
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Real Name: harvey coppock
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Its definately overheating then and not just blowing off through the cap?


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 Post subject: Re: Jeep Overheating
PostPosted: Thu Jan 02, 2014 9:52 am 
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Not quite sure what you mean.

The temperature goes right up when under load pulling the trailer and going up hill. A load of smoke comes out of the exhaust, she then comes to a stop, and the water in the rad is boiling and coming out.


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